While many are convinced that Harry Styles and Nadine Leopold aren't dating and are just friends, according to a new report from Us Weekly, the two are definitely a couple.

One source told the site: "Harry has been getting more serious with Nadine," adding that they are "spending lots of time together."

Well, there's not much denying that – as they were seen in LA at a tattoo parlor, out to lunch celebrating her birthday and at dinner with friends. The source also dished that Harry "planned a few activities for her birthday." We saw those balloons he got her...pretty romantic.

Still another source seems to believe that he's just having fun, explaining, "Harry is having a good time being a young rock star. You will know he has a girlfriend when he steps out on the red carpet with one. Until then, he's having fun and enjoying life."

So...since we haven't seen him on a red carpet with Nadine, should we assume they're just "having fun?"

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